JP2023180806A - double deck elevator - Google Patents

Abstract

To provide a double deck elevator capable of accurately landing an upper car and a lower car on their destination floors as much as possible, even if a wire-like body suspending the upper car and the lower car is elongated.SOLUTION: A double deck elevator which stops an outer car frame where an upper car suspended on one end side of a wire rope which is a wire-like body and a lower car suspended on the other end side are provided inside, at a target stop position in a hoistway, and lands the upper car and the lower car on their destination floors, includes: photosensors 54A and 55A which are proximity sensors provided in the outer car frame; light-shielding plates which are installed in each of the target stop positions, and are detected objects detected by the photosensors 54A and 55A; and a vertical position adjustment mechanism 100 which can adjust positions of the photosensors 54A and 55A in a vertical direction relative to the outer car frame.SELECTED DRAWING: Figure 4

Description

The present invention relates to a double-deck elevator, and particularly to a double-deck elevator in which an upper car and a lower car are provided within an outer car frame.

Double-deck elevators, which have a two-story structure with an upper car and a lower car installed in an outer car frame that ascends and descends in the hoistway, have a lower transport capacity than elevators with a single car. Excellent. In addition, less installation space is required to obtain the same transportation capacity. For this reason, it is being introduced into large-scale, high-rise buildings.

The outer car frame is connected to the counterweight by a main rope, and the main rope is hung on a sheave of a hoist installed in a machine room above the hoistway. Then, by driving a hoist motor constituting the hoist and rotating the sheave, the outer car frame, and eventually each of the upper and lower cars, moves up and down in the hoistway.

In the above-mentioned lifting control, in order to raise and lower the outer car frame to the target positions corresponding to the destination floors of the upper and lower cars, for example, a photo sensor, which is a type of proximity sensor, and a plurality of A light shielding plate is used (Patent Document 1). The photosensor is attached to the outer car frame. On the other hand, each of the plurality of light shielding plates is installed in the hoistway in correspondence with each of the target positions.

First, as an initial operation, the outer car frame is raised from the lowest target position to the highest target position. At this time, the rotation angle of the encoder provided in the hoisting machine motor when the photo sensor detects each of the light shielding plates is stored as a target stop position.

During normal operation, the hoist motor is controlled to raise and lower the outer car frame to the target positions corresponding to the respective destination floors of the upper and lower cars, and to cause the upper and lower cars to land on different floors. Ru.

Patent No. 6658240 International Publication No. 2012/131755

Incidentally, depending on the building, the distance between the two upper and lower destination floors may differ depending on the combination of destination floors. In double-deck elevators installed in such buildings, it is necessary to adjust the interval between the upper and lower cars (car interval) in accordance with the distance between the floors of the two destination floors that land at the same time.

As a double-deck elevator that makes this adjustment possible, the upper car is suspended from one end of a wire rope, which is a kind of cable-shaped body that is folded over a driving sheave installed on the outer car frame, and the other end is suspended from the upper car. It is known that the lower car has a floor adjustment mechanism in which the lower car is suspended (Patent Document 1, Patent Document 2).

According to the above-described inter-floor adjustment mechanism, by rotating the drive sheave in the normal or reverse direction, the upper car and the lower car can be relatively approached or separated in the vertical direction, making it possible to adjust the car interval. ing.

However, the wire rope, which is constantly pulled by the weight of the upper and lower cages, stretches over time. Due to this elongation, the upper car and lower car are displaced downward relative to the outer car frame. In this case, even if the outer car frame is stopped at the target position, the upper car and lower car will be vertically displaced from their respective destination floors.

In view of the above-mentioned problems, the present invention makes it possible to place the upper car and lower car on their respective destination floors as accurately as possible even if the cable-like body suspending the upper car and lower car stretches. The purpose is to provide a double-deck elevator that can.

In order to achieve the above object, the double-deck elevator according to the present invention has an upper car suspended from one end of a cable-like body that is hung on a sheave and folded back, and a lower car suspended from the other end. A double-deck elevator that stops an outer car frame provided on the inside at a target stop position in a hoistway, and lands the upper car and the lower car at their respective destination floors, the double-deck elevator provided on the outer car frame. a proximity sensor installed at each target stop position, a detected object detected by the proximity sensor, and a vertical position adjustment mechanism capable of adjusting the vertical position of the proximity sensor with respect to the outer car frame. It is characterized by having the following.

The vertical position adjustment mechanism is provided on one of the outer car frame and the proximity sensor, and includes a female screw member including a female screw having an axis in the vertical direction, and a female screw member provided on the other of the outer car frame and the proximity sensor. a male threaded member provided and screwed into the female threaded member, and when the male threaded member is rotated around the axis, the male threaded member is rotated relative to the female threaded member. The structure is characterized in that the position of the proximity sensor in the vertical direction with respect to the outer car frame is adjusted by spirally moving.

Furthermore, the vertical position adjustment mechanism includes a motor that rotationally drives the male threaded member, and the upper car and the upper car are displaced relative to the outer car frame due to the elongation of the cord from an initial state. It has a displacement amount acquisition means for acquiring the displacement amount of the lower car with respect to the outer car frame, and a drive control means for driving and controlling the motor, and the drive control means controls the rotation according to the acquired displacement amount. The present invention is characterized in that the motor is rotated so that the proximity sensor is displaced downwardly with respect to the outer car frame by an angle of 100 degrees.

According to the double deck elevator of the present invention having the above configuration, the vertical position adjustment mechanism allows the upper car and the lower car to be displaced relative to the outer car frame due to the elongation of the cable. The position of the proximity sensor relative to the outer car frame can be adjusted according to the amount of displacement of the proximity sensor relative to the outer car frame.

As a result, even if the cord-like body stretches, when the outer car frame is stopped at the target stop position where the proximity sensor detects the object to be detected, the upper car and lower car can be moved to their respective purposes. It is possible to land on the floor as much as possible.

1 is a diagram showing a schematic configuration of a double deck elevator according to Embodiment 1. FIG. (a) is a plan view, and (b) is a plan view showing a schematic structure of a photosensor and a light shielding plate that constitute the car frame detection means, the upper car detection means, and the lower car detection means provided in the double-deck elevator. FIG. It is a perspective view of the position adjustment mechanism which makes it possible to adjust the vertical position of the photosensor which is a component of the above-mentioned car frame detection means. FIG. 4 is a perspective view of the position adjustment mechanism viewed from a direction different from that in FIG. 3; FIG. 2 is a block diagram showing a hoisting machine, a main control device that controls the hoisting machine, and the like, and a sub-control device that controls the moving unit, the moving unit, and the like. It is a figure showing an elevating table. It is a figure which shows a part of storage area in RAM and ROM which the sub-control device installed in the outer car frame of the said double-deck elevator has. FIG. 6 is a diagram showing a state in which the upper car and the lower car are displaced downward relative to the outer car frame due to the elongation of the wire rope suspending the upper car and the lower car in the double-deck elevator. 7 is a diagram showing a schematic configuration of a vertical position adjustment mechanism in Embodiment 2. FIG. It is a figure showing the schematic structure of the double deck elevator concerning other embodiments.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a double deck elevator according to the present invention will be described with reference to the drawings.
<Embodiment 1>
〔overall structure〕
FIG. 1 shows a schematic configuration of a double deck elevator 10 according to a first embodiment. The double deck elevator 10 includes an upper beam 12A, a lower beam 12B, and two vertical frames 12C and 12D that connect the upper beam 12A and the lower beam 12B, and is approximately long in the vertical direction (in the vertical direction) when viewed from the front. It has a rectangular outer car frame 12.

Inside the outer car frame 12, an upper car 14 and a lower car 16 are provided side by side in the vertical direction.

A driven sheave 18 is attached to the outer car frame 12, and one end of a wire rope 20 that is hung over the driven sheave 18 above the upper car 14 and folded back is connected to the upper car 14, and the other end is connected to the upper car 14. is connected to the lower car 16. As a result, the upper car 14 is suspended from one end of the wire rope 20 hung on the driven sheave 18, and the lower car 16 is suspended from the other end. The driven sheave 18 is a sheave that rotates following the wire rope 20 that runs as the lower car 16 moves up and down, as will be described later. Note that the upper car 14 and the lower car 16 are guided so as to be movable in the vertical direction by a pair of guide rails (not shown) installed between the upper beam 12A and the lower beam 12B.

A moving unit 22 for moving the lower car 16 in the vertical direction is attached below the lower car 16 in the outer car frame 12. The moving unit 22 includes a screw jack 24 (hereinafter simply referred to as "jack 24") having an actuator 24A that moves up and down, and a motor 26 that drives the jack 24, with the upper end of the actuator 24A facing downward. It is connected to the lower end of the car 16.

The motor 26 is provided with a rotary encoder 27 (FIG. 5) that detects the rotation angle of its output shaft, and the rotation angle (number of rotations) of the output shaft is controlled based on the output result from the rotary encoder 27. By doing so, it is possible to control the displacement amount of the actuator 24A in the vertical direction.

When the jack 24 is driven to move the lower car 16 upward, the upper car 14, which is connected to the lower car 16 by the wire rope 20 hung on the driven sheave 18, moves the distance the lower car 16 moves due to its own weight. move downward the same distance. As a result, the interval between the upper car 14 and the lower car 16 in the vertical direction (hereinafter referred to as "car interval") can be shortened.

On the other hand, when the jack 24 is driven to move the lower car 16 downward, the upper car 14 is pulled up, so that the distance between the cars can be increased.

In this way, the moving unit 22 functions as a car interval changing means that changes the car interval by moving the lower car 16 in the vertical direction.

Here, the car interval refers to the distance (D) in the vertical direction between the floor surface 16A of the lower car 16 and the floor surface 14A of the upper car 14. In this example, the car intervals D to be adjusted are, for example, four types: D1, D2, D3, and D4. That is, in a building in which the double-deck elevator 10 is installed, there are four different floor heights between the two floors on which the lower car 14 and the upper car 16 land at the same time.

In order to accurately adjust the car interval D, this embodiment includes absolute position detection means for detecting the absolute positions of the upper car 14 and the lower car 16 in the vertical direction with respect to the outer car frame 12.

As this absolute position detection means, the double deck elevator 10 includes an absolute type magnetic linear scale 28 (hereinafter referred to as "magnetic scale 28").

The magnetic scale 28 is connected to a magnetic tape 30 that is a recording tape on which absolute position (distance) information from one end to the other end is recorded as a magnetic pattern (magnetic scale) with a resolution of, for example, 0.5 mm. It includes two reading units 32 and 34 that read the magnetic scale from the tape 30. As this magnetic scale 28, for example, a known scale such as "Absolute Magnetic Scale LIMAX Series" manufactured by Ergo Electronic Co., Ltd. can be used.

The magnetic tape 30 is attached to the outer car frame 12 so that its length direction is in the vertical direction. In this example, it is stretched between the upper beam 12A and the lower beam 12B.

In this example, the magnetic tape 30 is attached in such a direction that the scale is graduated from the bottom to the top (that is, the value on the scale increases toward the top). Note that the magnetic tape 30 may be attached to the outer car frame 12 in the opposite direction.

The reading unit 32 is fixed to the upper car 14, and the other reading unit 34 is fixed to the lower car 16. Note that the fixing positions of the reading units 32 and 34 in the vertical direction with respect to the upper car 14 and the lower car 16 are arbitrary. The fixed positions of the reading units 32 and 34 with respect to the upper car 14 and the lower car 16 are such that when the upper car 14 and the lower car 16 are moved up and down by the moving unit 22, the reading units 32 and 34 are fixed to the magnetic tape 30. Any position is acceptable as long as it can move along the magnetic tape 30 and read the magnetic scale recorded on the magnetic tape 30.

In the magnetic scale 28 provided as described above, the value of the magnetic scale read by the reading unit 32 indicates the absolute position of the upper car 14 in the vertical direction with respect to the outer car frame 12 at the time of reading. The value of the magnetic scale read indicates the absolute position of the lower car 16 in the vertical direction with respect to the outer car frame 12 at the time of reading. That is, the magnetic scale 28 can detect the absolute positions of the upper car 14 and the lower car 16 in the vertical direction with respect to the outer car frame 12.

Furthermore, the difference (hereinafter referred to as "scale difference") between the values of the magnetic scale read by the reading unit 32 and the reading unit 34 (hereinafter referred to as "scale value") corresponds one-to-one with the car interval D. Therefore, the car interval D is used as an index. As shown in FIG. 1, when the reading units 32 and 34 are fixed at the same height from the floor surfaces 14A and 16A of the upper and lower cars 14 and 16, respectively, the scale difference is equal to the car interval D. . The scale values read by the reading units 32 and 34 are referred to, and the car interval D is adjusted to the floor height of the destination floor, as will be described later.

As described above, a machine room 38 is provided above the hoistway 36 in which the outer car frame 12, in which the upper car 14, the lower car 16, etc. are provided, goes up and down. is installed. The hoisting machine 40 includes a hoisting machine motor 40A (FIG. 5), a sheave 40B provided on the output shaft (not shown) of the hoisting machine motor 40A, and a rotary encoder 40C provided coaxially with the output shaft. Including etc. For example, a multi-turn absolute type rotary encoder 40C can be used.

A deflection wheel 42 is installed adjacent to the hoist 40, and a main rope 44 is hung between the sheave 40B of the hoist 40 and the deflection sheave 42.

The outer car frame 12 is connected to one end of the main rope 44, and the counterweight 46 is connected to the other end.

In the above configuration, when the sheave 40B is rotated using the hoist motor 40A (FIG. 5) as a drive source, the outer car frame 12, the upper car 14, the lower car 16, and the counterweight 46 move toward the hoistway. 36 in opposite directions.

A car frame detection means 48 that detects the position of the outer car frame 12 in the vertical direction within the hoistway 36, an upper car detection means 50 that detects the position of the upper car 14 in the vertical direction within the hoistway 36, and a lower car A lower car detecting means 52 is provided for detecting the position in the vertical direction within the 16 hoistway 36.

The car frame detection means 48 includes a pair of photosensors 54A and 55A provided on the outer car frame 12 and a light-shielding plate fixed to the side wall 36A of the hoistway 36, which is an object to be detected by the photosensors 54A and 55A. Contains 56A.

The upper car detection means 50 includes a pair of photosensors 54B and 55B fixed to the upper car 14 and a light shielding plate 56B, which is an object to be detected, which is fixed to the side wall 36A of the hoistway 36 and is detected by the photosensors 54B and 55B. including.

The lower car detection means 52 includes a pair of photosensors 54C and 55C fixed to the lower car 16 and a light shielding plate 56C which is an object to be detected by the photosensors 54C and 55C fixed to the side wall 36A of the hoistway 36. including.

Each of the photosensors 54A, 54B, and 54C and each of the photosensors 55A, 55B, and 55C have basically the same configuration, so if there is no need to distinguish between them, use the alphabetical subscripts (A, B, C). ) will be omitted in the explanation. The same applies to the light shielding plates 56A, 56B, and 56C.

FIG. 2(a) shows a plan view of the photosensors 54 and the light shielding plate 56, and FIG. 2(b) shows a side view of the photosensors 54, 55 and the light shielding plate 56, respectively.
As shown in FIG. 2, the photosensor 54 is a transmissive type photosensor in which a light emitting element 542 and a light receiving element 544 are provided facing each other, and a light emitting element 542 and a light receiving element 544 are arranged opposite each other. It is configured to detect the incoming light shielding plate 56.

The photosensor 55 is the same sensor as the photosensor 54, and is a transmissive photosensor configured to detect a light shielding plate 56 that enters a region where a light emitting element and a light receiving element (not shown) face each other.

Returning to FIG. 1, the fixed positions of each of the light shielding plates 56A, 56B, and 56C in the vertical direction will be described.

First, the light shielding plates 56B and 56C will be explained. The light shielding plate 56B is fixed at a position where it is simultaneously detected by the photosensors 54B and 55B when the upper car 14 has landed on the destination floor.

The light shielding plate 56C is fixed at a position where it is simultaneously detected by the photosensors 54C and 55C when the lower car 16 lands on the destination floor.

Therefore, it is determined whether each of the upper car 14 and the lower car 16 has landed on the destination floor, depending on whether the photosensors 54B, 55B and the photosensors 54C, 55C detect the light shielding plates 56B, 56C, respectively. can do.

When the upper car 14 and the lower car 16 have landed on their respective destination floors at the same time, and the length of the wire rope 20 is the standard length, the light shielding plate 56A is activated by the photosensors 54A and 55A at the same time. Fixed at the position to be detected. Here, the standard length refers to the length of the wire rope 20 when the installation of the double-deck elevator 10 in the building is completed and when no passengers or the like are on the upper car 14 and the lower car 16. In other words, the reference length is the length of the wire rope 20 defined by the design specifications.

The light shielding plate 56B and the light shielding plate 56C are provided as a pair for each of the two destination floors where the upper car 14 and the lower car 16 land at the same time. Further, a light shielding plate 56A is provided corresponding to the pair of light shielding plates 56B and 56C. That is, the light shielding plate 56A is provided at each target stop position of the outer car frame 12 in the vertical direction within the hoistway 36.

Photo sensors 54B, 55B and photosensors 54C, 55C are fixed to upper car 14 and lower car 16, respectively. On the other hand, the photosensors 54A and 55A are provided so that their vertical positions relative to the outer car frame 12 can be adjusted by a vertical position adjustment mechanism 100.

3 shows a perspective view of the position adjustment mechanism 100, and FIG. 4 shows a perspective view of the position adjustment mechanism 100 viewed from a direction different from that shown in FIG.

The position adjustment mechanism 100 has a bracket 102 fixed to the outer car frame 12 (not shown in FIGS. 3 and 4). The bracket 102 is, for example, a pressed metal plate, and includes a horizontal plate portion 102a provided in a horizontal position and a strip-shaped vertical plate portion 102b bent at a right angle from one end of the horizontal plate portion 102a. . A long hole 102c that is long in the vertical direction is formed in the vertical plate portion 102b.

The position adjustment mechanism 100 also includes a slide member 104. The slide member 104 is box-shaped, with four sides of a rectangular metal plate bent at right angles. Regarding the names of the parts of the box-shaped slide member 104, the part indicated by the reference numeral 104a is referred to as the bottom, the part indicated by the reference numeral 104b is referred to as the first side wall, and the part indicated by the reference numeral 104c is referred to as the second side wall.

A photosensor 54A and a photosensor 55A are attached to the bottom portion 104a by mounting screws (not shown) as shown.

Two female threads (not shown) are formed in the thickness direction of the first side wall portion 104b at intervals in the vertical direction. Bolts 106 and 108 inserted into the elongated holes 102c are screwed into each of the two female threads.

When the bolts 106 and 108 are loosened, the slide member 104 (and thus the photosensors 54A and 55A) can freely slide vertically with respect to the bracket 102 (and thus the outer car frame 12). On the other hand, when the bolts 106 and 108 are tightened, the slide member 104 (and thus the photosensors 54A and 55A) is fixed to the bracket 102 (and thus the outer car frame 12).

An angle member 110 made of a rectangular metal plate bent into an L-shape is attached to the second side wall portion 104c. The shorter side of the bent portion of the angle member 110 will be referred to as a horizontal plate portion 110a, and the longer side will be referred to as a vertical plate portion 110b.

Two screw insertion holes (not shown) are opened in the vertical plate portion 110b at intervals in the vertical direction in the thickness direction. Two female screws (not shown) are formed in the second side wall portion 104c in the thickness direction at the same intervals as the screw insertion holes in the vertical direction.

The angle member 110 is inserted into each of the two screw insertion holes of the vertical plate portion 110b, and is attached to the slide member by bolts 112 and 114 screwed into each of the two female screws formed in the second side wall portion 104c. It is fixed at 104.

A screw insertion hole (not shown) is opened in the thickness direction of the horizontal plate portion 110a, and a nut 116, which is a female screw member, has a female screw portion (not shown) communicated with the screw insertion hole. , is fixed to the horizontal plate portion 110b by spot welding (not shown). The female screw portion of the fixed nut 116 has an axis in the vertical direction (in this example, the vertical direction).

A screw insertion hole (not shown) is formed in the horizontal plate portion 102a of the bracket 102, and a bolt 118, which is a male threaded member, is inserted into the screw insertion hole and screwed into the nut 116. In FIG. 4, the tip of the bolt 118 screwed into the nut 116 projects downward from the screw insertion hole (not shown) of the horizontal plate portion 110a.

In the vertical position adjustment mechanism 100 having the above configuration, when the bolts 106 and 108 are loosened and the head 118a of the bolt 118 is rotated, the nut 116 is moved vertically relative to the male threaded portion of the bolt 118. Spiral. When viewed from above the head 118a, if the head 118a is rotated clockwise, the nut 116 will screw upward (move), and if the head 118a is rotated counterclockwise, the nut 116 will screw downward (move). .

As a result, the angle member 110 to which the nut 116 is fixed, the slide member 104 fixed to the angle member 110, and the photosensors 54A and 55A attached to the slide member 104 move in the vertical direction. That is, according to the vertical position adjustment mechanism 100, by rotating the bolt 118, the vertical position of the photosensors 54A, 55A with respect to the outer car frame 12 can be adjusted. The vertical position adjustment distance will be described later.

The operation of the double deck elevator 10 having the above-described structure is controlled by a main controller 58 and a sub-control device 66.

The main control device 58 is installed in the machine room 38 and controls the drive of the hoisting machine motor 40A (FIG. 5) of the hoisting machine 40 and the like. The main controller 58 controls the rotation of the hoist motor 40A based on the output value (rotation angle) from the rotary encoder 40C of the hoist 40 to raise and lower the outer car frame 12.

As shown in FIG. 5, the main control device 58 has a configuration in which a CPU 60 is connected to a RAM 62 and a ROM 64.

The ROM 64 has a lift table 640, as shown in FIG. The lift table 640 is a table that stores target rotation angles of the rotary encoder and car interval identification information in association with each other for each set of floors (destination floors) on which the lower car 16 and the upper car 14 land at the same time. Each of the associations is identified by an ID (001, 002, 003, . . . ).

The target rotation angle is referred to by the CPU 60 when controlling the elevation of the outer car frame 12. The CPU 60 rotates the hoist motor 40A until the output value (rotation angle) from the rotary encoder 40C matches the target rotation angle (one of E1, E2, E3, ...) corresponding to the destination floor. , the hoist motor 40A is stopped in a matched state. As a result, the outer car frame 12 is stopped at a position (target stop position) in the vertical direction within the hoistway 36 where the upper car 14 and the lower car 16 can simultaneously land on their respective destination floors. Become. Since the target rotation angle has a one-to-one correspondence with the target stop position of the outer car frame 12 in the vertical direction within the hoistway 36, the target rotation angle is nothing but the target stop position.

Each of the target rotation angles in lift table 640 is stored during the data acquisition operation. In the data acquisition operation, the outer car frame 12 is actually raised and lowered, and each output value (rotation angle) outputted by the rotary encoder 40C when the outer car frame 12 is detected by each of the car frame detection means 48 is sent to the lifting table 640. Store. The data acquisition operation is performed when the double deck elevator 10 is installed in the building and periodically thereafter, and the target rotation angle of the lifting table 640 is updated in a timely manner.

The car interval identification information d1, d2, d3, and d4 specify the car intervals D1, D2, D3, and D4, respectively. For example, if the destination floor of the lower car 16 is 1 and the destination floor of the upper car 14 is 2, the car interval D should be adjusted to D1, so it corresponds to ID = 001 of the car interval identification information of the elevator table 640. "d1" is stored in the column.

Returning to FIG. 5, the CPU 60 executes various control programs stored in the ROM 64 to centrally control the hoisting machine motor 40A and the like to smoothly maintain the outer car frame 12 (upper car 14, lower car 16). ), the operation is realized by lifting and lowering operations in the hoistway 36. In addition, the main controller 58 (its CPU 60) instructs the sub-control device 66 to execute various commands such as "car interval adjustment command", "initial position acquisition command", "elongation amount calculation command", etc., which will be described later, at predetermined timings. Issue orders, etc.
The RAM 62 is used as a work memory when the CPU 60 executes various control programs.

The sub-control device 66 is installed in the outer car frame 12, as shown in FIG. The sub-control device 66 drives and controls the moving unit 22 to adjust the car interval D. The sub-control device 66 has a CPU 68 and a ROM 70 and a RAM 72 connected to the CPU 68, as shown in FIG. The ROM 70 stores various programs executed by the CPU 68, and also has tables and storage areas for storing various information.

The RAM 72 is used as a work memory when the CPU 68 executes various programs, and also has various storage areas.

The ROM 70 has a car interval information table 700, as shown in FIG. 7(a). The car interval information table 700 stores car interval identification information d1, d2, d3, and d4 and corresponding scale differences ΔS1, ΔS2, ΔS3, and ΔS4 in association with each other. The scale differences ΔS1 to ΔS4 are hereinafter referred to as "standard scale differences." Each of the reference scale differences ΔS1 to ΔS4 has an allowable width in consideration of the required car spacing accuracy. Upon receiving a car interval adjustment command including car interval identification information (any of d1, d2, d3, d4) from the main controller 58, the CPU 68 reads the corresponding reference scale difference (ΔS1, ΔS2) from the car interval information table 700. , ΔS3, ΔS4). Then, the CPU 68 controls the moving unit 22 to move the upper car 14 and the lower car 16 in the vertical direction so that the scale difference obtained from the scale values read by the reading units 32 and 34 falls within the range of the reference scale difference. let As a result, the car interval D is adjusted to the car interval (any one of D1 to D4) that matches the floor heights of the two destination floors, the upper and lower.

However, the wire rope 20 suspending the upper car 14 and the lower car 16 is always under tension, and this tension causes the wire rope 20 to stretch over time.

Therefore, even if the outer car frame 12 is stopped at the target stop position with the car interval D accurately adjusted, the upper car 14 and the lower car 16 will not be able to move in the vertical direction between their respective destination floors. A misalignment will occur. The amount of displacement is the amount of displacement of the upper and lower cars 14 and 16 relative to the outer car frame 12 due to the elongation of the wire rope 20 (hereinafter referred to as "relative displacement amount"). ). Therefore, it is necessary to adjust the stopping position of the outer car frame 12 in accordance with the amount of relative displacement. To do so, first, it is necessary to understand the amount of relative displacement corresponding to the amount of elongation of the wire rope 20.

[Relative displacement amount acquisition]
Hereinafter, three methods of obtaining the relative displacement amount, ie, first, second, and third methods, will be described.
(First acquisition method)
The first acquisition method is a method of acquiring from the amount of elongation of the wire rope 20 using the magnetic scale 28. Since the method for obtaining the amount of elongation of the wire rope 20 is described in detail in Patent Document 1, it will be briefly described here.

In order to obtain the amount of elongation, the ROM 70 and RAM 72 further include a storage area for storing scale values read by the reading units 32 and 34 of the magnetic scale 28.

As shown in FIG. 7B, the ROM 70 serves as an area for storing the scale values read by the reading units 32 and 34, and has an initial position memory for each reading unit 32 (upper cage) and reading unit 34 (lower cage). It has regions 701 and 702.
As shown in FIG. 7(c), the RAM 72 serves as an area for storing the scale values read by the reading units 32 and 34, and has a temporal position storage area for each reading unit 32 (upper cage) and reading unit 34 (lower cage). It has regions 721 and 722. That is, the ROM 70 and the RAM 72 function as storage means for separately storing the scale values (absolute positions) read by the reading units 32 and 34 of the magnetic scale 28. The initial position storage areas 701, 702 and the elapsed position storage areas 721, 722 are storage areas provided in the ROM 70 or RAM 72 according to the timing of reading by the reading units 32, 34, but the timing will be described later. do.

As shown in FIG. 7F, the RAM 72 also stores elongation data calculated as described below based on the absolute positions stored in the initial position storage areas 701 and 702 and the elapsed position storage areas 721 and 722. It has an elongation amount storage area 723 that stores the elongation amount.

The RAM 72 further includes a relative displacement amount storage area 724 that stores the relative displacement amount calculated from the amount of elongation stored in the elongation amount storage area 723, as shown in FIG. 7(g).

Next, a process for obtaining the amount of elongation of the wire rope 20, etc. executed by the sub-control device 66 will be explained. Upon receiving the "initial position acquisition command" from the main control device 58, the CPU 68 (FIG. 3) of the sub control device 66 performs initial position acquisition processing.

The initial position acquisition command is issued at a timing immediately after the wire rope 20 is attached with the length adjusted to the reference length, such as immediately after the wire rope 20 is replaced with a new one. Here, a state in which the attached wire rope 20 is at the reference length is defined as an "initial state".

Upon receiving the initial position acquisition command, the CPU 68 acquires the absolute position (scale value) of the upper car 14 and the absolute position (scale value) of the lower car 16 from the reading unit 32 and the reading unit 34, respectively, and The absolute position of the car 14 and the absolute position of the lower car 16 are stored in initial position storage areas 701 and 702 (FIG. 7(b)) of the ROM 70, respectively.

Hereinafter, the absolute positions (scale values) stored in the initial position storage areas 701 and 702 will be referred to as "initial positions". Further, the initial positions stored in the initial position storage areas 701 and 702 will be described below as "U1" and "L1", respectively, as shown in FIG. 7(d).

Next, the elongation amount calculation process executed by the sub-control device 66 will be explained. Upon receiving the "elongation amount calculation command" from the main control device 58, the CPU 68 (FIG. 5) of the sub-control device 66 performs an elongation amount calculation process.

The elongation amount calculation command is issued at a predetermined timing such as when the double-deck elevator 10 starts operating every day, or at a predetermined time every day when it is quiet late at night. Upon receiving the elongation amount calculation command, the CPU 68 obtains the absolute position (scale value) of the upper car 14 and the absolute position (scale value) of the lower car 16 from the reading unit 32 and the reading unit 34, respectively, and The absolute position of the car 14 and the absolute position of the lower car 16 are respectively overwritten and stored in the temporal position storage areas 721 and 722 (FIG. 7(c)) of the RAM 72.

Hereinafter, the absolute positions stored in the temporal position storage areas 721 and 722 will be referred to as "chronological positions." Further, the temporal positions stored in the temporal position storage areas 721 and 722 will be described below as "U2" and "L2", respectively, as shown in FIG. 7(e).

Next, the CPU 68 calculates the difference ΔL between the temporal position L2 of the lower car 16 and the initial position L1 of the lower car 16.

ΔL=(L2)-(L1)...(1)

From the calculated difference ΔL and the initial position U1 of the upper car 14, an estimated position Us of the upper car 14 is calculated assuming that the wire rope 20 is not stretched. Here, the "estimated position" is the estimated position at the time when the absolute positions (chronological positions) stored in the temporal position storage areas 721 and 722 are read by the reading units 32 and 34, respectively.

Us=(U1)-(ΔL)...(2)

Equation (2) is based on the fact that if the wire rope 20 is not stretched, the upper cage 14 will be located at a position displaced by the same amount as the displacement amount (ΔL) of the lower cage 16.

A difference ΔU between the temporal position U2 of the upper car 14 and the calculated estimated position Us is calculated.

ΔU=(Us)−(U2)…(3)

In this example, the difference ΔU is the elongation amount ΔR of the wire rope 20, so ΔU is stored as it is in the elongation amount storage area 723 (FIG. 7(f)) of the RAM 72 as the elongation amount ΔR of the wire rope 20. do.

In other words, the actual position of the upper car 14 over time is calculated from the estimated position (scale value) of the upper car 14 when no elongation occurs in the wire rope 20 (when the wire rope 20 remains at the standard length). By subtracting the (scale value), the amount of elongation ( The amount of growth due to changes over time) is calculated.

In the case of the elongation amount ΔR of the wire rope 20, half of it (ΔR/2) is the difference between the upper car 14 and the lower car 16 with their respective destination floors when the outer car frame 12 is stopped at the target stop position. This corresponds to the amount of vertical deviation between That is, (ΔR/2) is the displacement amount ( (relative displacement amount). The CPU 68 stores (ΔR/2) in the relative displacement amount storage area 724 (FIG. 7(g)) of the RAM 72.

As explained above, in the case of the first acquisition method, the sub-control device 66 and the magnetic scale 28 are displaced relative to the outer car frame 12 due to the elongation of the wire rope 20 from the initial state. It functions as a displacement amount acquisition means for acquiring the amount of displacement (relative displacement amount) of the car 14 and the lower car 16 with respect to the outer car frame 12.

The relative displacement amount (ΔR/2) stored in the RAM 72 can be known from a maintenance portable terminal (not shown) connected to the sub-control device 66. That is, by connecting the mobile terminal (not shown) to the sub-control device 66, reading the relative displacement amount from the RAM 72, and displaying the read relative displacement amount on the monitor screen of the mobile terminal, maintenance management is performed. The worker can know the amount of relative displacement caused by the elongation of the wire rope 20 due to aging.

Alternatively, the mobile terminal may be connected to the main control device 58 and read out the relative displacement amount stored in the RAM 72 of the sub-control device 66 from the main control device 58.

(Second acquisition method)
The second acquisition method is a method of acquiring the relative displacement amount using the car frame detection means 48, the upper car detection means 50, and the lower car detection means 52. The second acquisition method will be explained with reference to FIG. 8.

FIG. 8A shows, for example, a target rotation angle E3 (FIG. 6) in which the output value (rotation angle) from the rotary encoder 40C corresponds to the destination floor (the lower car 14 is on the 3rd floor and the upper car 16 is on the 4th floor). In this state, the outer car frame 12 is stopped at a position that coincides with the above. That is, the photosensor 54A and the photosensor 55A are simultaneously detecting the light shielding plate 56A. Further, in this example, it is assumed that the wire rope 20 is stretched by ΔR.

Since the wire rope 20 is stretched by ΔR, the upper car 16 and the lower car 14 are each shifted downward by a distance (ΔR/2) (relative displacement amount) from their respective landing positions. Therefore, the photosensor 55B does not detect the light shielding plate 56B, and the photosensor 55C does not detect the light shielding plate 56C.

From the above state, the main controller 58 controls the hoist motor 40A so that the photosensor 54B and the photosensor 55B simultaneously detect the light shielding plate 56B, and the photosensor 54C and the photosensor 55C simultaneously detect the light shielding plate 56C. Pull up the outer car frame 12 until it is detected. The main controller 58 determines the vertical movement distance of the outer car frame 12 during this period from the difference between the output value of the rotary encoder 40C at the start of the pull-up and the output value of the rotary encoder 40C at the end of the pull-up. This moving distance corresponds to the amount of vertical deviation between the upper car 14 and the lower car 16 from their respective destination floors, that is, the relative displacement amount when the outer car frame 12 is stopped at the target stop position. .

The main controller 58 stores the relative displacement amount in the RAM 62. The amount of relative displacement stored in the RAM 62 can be known from a maintenance portable terminal (not shown) connected to the main controller 58.

As explained above, in the case of the second acquisition method, the main controller 58, the hoisting machine 40, the car frame detection means 48, the upper car detection means 50, and the lower car detection means 52 acquire the amount of relative displacement. It functions as a displacement amount acquisition means.

(Third acquisition method)
The third acquisition method is a method in which a maintenance worker actually measures. For example, in the state shown in FIG. 8(a) described above, the amount of deviation of the upper car 14 from the reference position (position in the state shown in FIG. 1) with respect to the outer car frame 12, and/or the outer car frame of the lower car 16. In this method, the amount of deviation from the reference position (position in the state shown in FIG. 1) with respect to 12 is actually measured using a measuring tape or the like. The amount of deviation corresponds to the amount of relative displacement.

Next, adjustment of the vertical positions of the photosensors 54A and 55A based on the relative displacement amount obtained by any of the first to third methods will be explained with reference to FIGS. 3, 4, and 8. do. The maintenance worker can know the amount of relative displacement using the mobile terminal (not shown) in the case of the first and second acquisition methods, and by actual measurement in the case of the third acquisition method.

The maintenance worker loosens the bolts 106 and 108 of the vertical position adjustment mechanism 100, rotates the head 118a of the bolt 118 counterclockwise when viewed from above, and moves the photosensors 54A and 55A downward. The moving distance is the above-mentioned relative displacement amount. For example, if the thread pitch of the bolt 118 is 1 mm, if the head 118a is rotated once, the photosensors 54A and 55A will move by 1 mm, which can be used as a guideline for the number of rotations. The moving distance can be adjusted, for example, by measuring the distance between the lower surface of the horizontal plate portion 102a and the upper surface of the horizontal plate portion 110a. When the movement of the photosensors 54A, 55A is completed, the bolts 106, 108 are tightened, and the vertical position adjustment work is completed.

FIG. 8(b) shows the positions of the photosensors 54A and 55A at the time when the above-mentioned vertical position adjustment work is completed. Due to the vertical position adjustment work, the photosensors 54A and 55A are moved downward relative to the outer car frame 12 by an amount of relative displacement (ΔR/2) from the position shown in FIG. 8(a). There is.

After adjusting the vertical positions of the photosensors 54A and 55A, the above-described data acquisition operation is executed to update the target rotation angle of the lifting table 640. After the update, the hoist motor 40A is rotated until the output value (rotation angle) from the rotary encoder 40C matches the target rotation angle corresponding to the destination floor, and when the output value (rotation angle) from the rotary encoder 40C matches, the hoist motor 40A is rotated. When the outer car frame 12 is stopped at a position where the photosensor 54A and the photosensor 55A simultaneously detect the light shielding plate 56A, the upper car 14 and the lower car 16 are moved as shown in FIG. 8(c). You will land on each destination floor without being deviated from the destination floor.

As explained above, according to the double deck elevator 10 according to the first embodiment, the vertical position adjustment mechanism 100 adjusts the outer car frame of the photo sensors 54A and 55A provided in the outer car frame 12 according to the relative displacement amount. The position relative to 12 can be adjusted downward.

As a result, even if the wire rope 20 stretches, when the outer car 12 is stopped at the target stop position where the light shielding plate 56A is detected by the photosensors 54A and 55A, the upper car 14 and the lower car 16 are The goal is to land on the destination floor as accurately as possible.

In the first embodiment, the relative positions of the photosensors 54A and 55A with respect to the outer car frame 12 among the photosensors 54A and 55A and the light shielding plate 56A that constitute the car frame detection means 48 are adjusted. It is also conceivable to adjust the vertical position of the plate 56A with respect to the hoistway 36. However, as described above, the light shielding plate 56A is provided for each target stop position of the outer car frame 12, so the position adjustment must be repeated multiple times for each target stop position, which takes a lot of time. becomes. On the other hand, in Embodiment 1, only one adjustment is required, so the working time can be significantly shortened.

<Embodiment 2>
In the first embodiment, a maintenance worker manually adjusted the vertical positions of the photosensors 54A and 55A with respect to the outer car frame 12, but in the second embodiment, the adjustment can be done automatically. Embodiment 2 has a vertical position adjustment mechanism 200 (described later) instead of the vertical position adjustment mechanism 100, and uses a sub-control device 66 for drive control of a motor 212 (FIG. 9) that constitutes the vertical position adjustment mechanism 200. basically has the same configuration as the first embodiment. Therefore, a description of the common parts will be omitted, and the different parts will be mainly described below.

FIG. 9 shows a schematic configuration of the vertical position adjustment mechanism 200 in the second embodiment. In the vertical position adjustment mechanism 200, the photosensors 54A and 55A are attached to a holding member 202 having a rectangular tube shape. The holding member 202 is attached to the outer car frame 12 via a linear guide 204.

The linear motion guide 204 includes a rail 204a fixed to the outer car frame 12 and a slider 204b fixed to the holding member 202. The linear guide 204 guides the holding member 204 slidably in the vertical direction with respect to the outer car frame 12.

A nut 206a, which is a female screw member constituting the ball screw 206, is attached to the upper end of the holding member 202. The female screw portion (not shown) of the nut 206a attached to the holding member 202 has an axis in the vertical direction (in this example, the vertical direction).

A screw shaft 206b, which is a male screw member constituting the ball screw 206, is screwed into the nut 206a. The upper end portion of the screw shaft 206b protrudes from the nut 206a. A lower end portion of the screw shaft 206b protrudes from the holding member 202.

The lower end of the screw shaft 206b is rotatably supported by a bearing (not shown) provided on a support member 208 fixed to the outer car frame 12.

The upper end of the screw shaft 206b is connected to an output shaft 212a of a motor 212 via a coupling 210. The motor 212 is fixed to the outer car frame 12 by a mounting member 214. The motor 212 rotates the screw shaft 206b via the coupling 210. For example, a stepping motor can be used as the motor 212.

According to the vertical position adjustment mechanism 200 having the above configuration, the holding member 202 moves downward when the motor 212 is rotated in the normal direction, and moves upward when the motor 212 is rotated in the reverse direction. In the second embodiment, a sub-control device 66 (FIG. 5) is used as a drive control means for controlling the drive of the motor 212. Note that illustration of the connection relationship between the motor 212 and the sub-control device 66 is omitted.

Next, the movement process of the photosensors 54A and 55A by the vertical position adjustment mechanism 200 will be explained for each method of obtaining relative variables.

(For the first acquisition method)
The CPU 68 of the sub-control device 66 refers to the relative displacement amount storage area 724 (FIG. 7(g)) in the RAM 72 to obtain the relative displacement amount. The CPU 68 calculates the rotation angle of the motor 212 according to the obtained relative displacement amount, rotates the motor 212 in the forward direction by the calculated rotation angle, and moves the photosensors 54A and 55A downward with respect to the outer car frame 12. Displace.

(For the second acquisition method)
The CPU 68 of the sub-control device 66 refers to the RAM 62 of the main control device 58 to obtain the relative displacement amount. The CPU 68 calculates the rotation angle of the motor 212 according to the obtained relative displacement amount, rotates the motor 212 in the forward direction by the calculated rotation angle, and moves the photosensors 54A and 55A downward with respect to the outer car frame 12. displace

(In case of third acquisition method)
The maintenance worker connects a mobile terminal (not shown) to the sub-control device 66, and transfers the relative displacement amount obtained by actual measurement from the mobile terminal to the relative displacement amount storage area 724 of the RAM 72 of the sub-control device 66 (FIG. 7). (g)).

Therefore, in the case of the third acquisition method, the sub-control device 66 functions as a displacement amount acquisition means that receives and acquires the relative displacement amount from the mobile terminal. The CPU 68 of the sub-control device 66 refers to the relative displacement amount storage area 724 to obtain the relative displacement amount. The CPU 68 calculates the rotation angle of the motor 212 according to the obtained relative displacement amount, rotates the motor 212 in the forward direction by the calculated rotation angle, and moves the photosensors 54A and 55A downward with respect to the outer car frame 12. Displace.

Although the double deck elevator according to the present invention has been described above based on the embodiments, it goes without saying that the present invention is not limited to the above-described embodiments, and, for example, the following embodiments may also be adopted.
(1) The double deck elevator 10 according to Embodiments 1 and 2 is a jack-type double deck in which one of the upper car 14 and the lower car 16 (in this example, the lower car 16) is moved in the vertical direction by the jack 24. The double-deck elevator 80 shown in FIG. This is a traction-type double-deck elevator that is hung on a drive sheave 82A and changes car spacing by rotating the drive sheave 82A with a motor 82B.

The double-deck elevator 80 has substantially the same configuration as the double-deck elevator 10 of Embodiments 1 and 2, except that the driving method for changing the car interval between the upper car 14 and the lower car 16 is different. Therefore, in FIG. 10, components that are substantially the same as those of the double deck elevator 10 shown in FIG.

(2) In the above embodiment, the wire rope 20 is used as the cable-like body for suspending the upper car 14 and the lower car 16 within the outer car frame 12. The shaped body is not limited to a wire rope, and for example, a rubber belt containing a core wire such as a steel cord or a belt made of carbon fiber may be used. In short, the present invention can be applied to a double-deck elevator having a structure in which an upper car and a lower car are suspended by a cord-like body that stretches over time.

(3) In the above embodiment, the photoelectric type photosensors 54 and 55 are used as the proximity sensors, but the present invention is not limited to this, and an inductive type or capacitance type proximity sensor may be used. In the above embodiment, the light shielding plate 56 is used as the object to be detected by the photosensors 54 and 55, but the material of the object to be detected is selected as appropriate depending on the type of proximity sensor used.

(4) In the above embodiment, the outer car frame 12 is provided with the bolt 118, which is a male thread member, and the threaded shaft 206b, and the photosensors 54 and 55 are provided with the nut 116, which is a female thread member, and the nut 206a. Conversely, the outer car frame 12 may be provided with a female screw member, and the photosensors 54 and 55 may be provided with male screw members.

For example, in the first embodiment (FIGS. 3 and 4), a nut is fixed to the horizontal plate part 102a by welding or the like, and a bolt is inserted from below into a screw insertion hole (not shown) of the horizontal plate part 110a. It can be configured to be screwed into a nut.

In the second embodiment (FIG. 9), the nut of the ball screw is fixed to the mounting member 214, the screw shaft of the ball screw is screwed into this, and the screw shaft is rotated by the motor attached to the holding member 202. It can be configured to drive.

(5) In the above embodiment, one end of the wire rope 20 that has been folded over the driven sheave 18 (FIG. 1) or the drive sheave 82A (FIG. 10) is directly connected to the upper car 14, and the other end is Although the upper car 14 and the lower car 16 are suspended by directly connecting to the car 16, the manner in which the upper car 14 and the lower car 16 are suspended by a wire rope is not limited to this. (first end) and the other end (second end) are respectively fixed to the outer car frame, a first movable pulley is hung over the wire rope portion extending from the drive sheave to the first end, and the second A second movable pulley is hung over the wire rope portion reaching the end, the upper cage is connected to the first movable pulley, and the lower cage is connected to the second movable pulley, thereby connecting the upper and lower cages to the wire rope. It may also be configured to be suspended.

Conceptual diagrams of roping in such a hanging configuration are described in FIGS. 11 and 12 of Patent Document 1 as Modification 1 and Modification 2 (paragraph [0142 ]-[0146], [0156]-[0158]), their description in this case will be omitted.

In the case where the relative displacement amount is obtained by the first obtaining method, that is, the method of obtaining the elongation amount of the wire rope 20 using the magnetic scale 28, in the above embodiment, if the obtained elongation amount is ΔR, half of it is obtained. (ΔR/2) was the relative displacement amount.

However, due to the difference in roping, in the first modification and the second modification, the relative displacement amount corresponding to the elongation amount ΔR is as follows.

Modification 1: Relative displacement = (ΔR/8)
Modification 2: Relative displacement = (ΔR/12)

In other words, the amount of relative displacement of the upper and lower cars relative to the outer car frame due to elongation of the wire rope from the initial state is the same as the amount of elongation (ΔR) of the wire rope. Even if there is, the roping results in different values [(ΔR/2), (ΔR/8), (ΔR/12), etc.].

In short, in the first acquisition method, there is a difference between the amount of elongation of the wire rope and the amount of relative displacement of the upper and lower cars relative to the outer car frame, which are displaced relative to the car frame due to the elongation of the wire rope. It can be applied if there is a certain correlation.

The double deck elevator according to the present invention can be suitably used, for example, as an elevator installed in a building with uneven floor heights.

10, 80 Double deck elevator 12 Outer car frame 14 Upper car 16 Lower car 20 Wire rope 54A, 55A Photo sensor 56C Light shielding plate 100, 200 Vertical position adjustment mechanism

Claims (3)

An upper car suspended from one end of the cable-shaped body that is hung on a sheave and folded back, and a lower car suspended from the other end move the outer car frame with the inner car frame to the target stopping position in the hoistway. A double-deck elevator that stops and causes the upper car and the lower car to land on their respective destination floors,
a proximity sensor provided on the outer car frame;
a detected object installed at each target stop position and detected by the proximity sensor;
a vertical position adjustment mechanism that can adjust the vertical position of the proximity sensor with respect to the outer car frame;
A double deck elevator characterized by having. The vertical position adjustment mechanism is
a female screw member provided on one of the outer car frame and the proximity sensor and including a female screw having an axis in the vertical direction;
a male screw member provided on the other of the outer car frame and the proximity sensor and screwed into the female screw member;
including;
When the male threaded member is rotated around the axis, the male threaded member is screwed relative to the female threaded member, so that the vertical position of the proximity sensor with respect to the outer car frame is adjusted. 2. A double-deck elevator according to claim 1, characterized in that it is configured to be regulated. The vertical position adjustment mechanism includes a motor that rotationally drives the male screw member,
displacement amount obtaining means for obtaining the amount of displacement of the upper cage and the lower cage relative to the outer car frame, which have been displaced relative to the outer cage frame due to the elongation of the cord from an initial state;
a drive control means for controlling the drive of the motor;
has
3. The drive control means rotates the motor so that the proximity sensor is displaced downward with respect to the outer car frame by a rotation angle corresponding to the obtained displacement amount. double deck elevator.